For other uses, see number 999.

Years: 996 997 998 - 999 - 1000 1001 1002

Decades: 960s 970s 980s - 990s - 1000s 1010s 1020s

Centuries: 9th century - 10th century - 11th century 999 (number)

Events

• Silesia is incorporated into territory ruled by Boleslaus I of Poland
• Pope Silvester II succeeds Pope Gregory V

Deaths

• December 16 - Saint Adelaide of Italy

af:999 ca:999 de:999 es:999 eo:999 eu:999 fr:999 hr:999 it:999 nl:999 no:999 pl:999 ro:999 ru:999 sl:999 fi:999 sv:999 uk:999 zh:999年